What role does evidence play in establishing a historical narrative

Historians use evidence from primary and secondary sources and oral histories to answer their questions. They have to choose what information is most important and trustworthy as evidence. Historical evidence is not always simple. Sometimes what historians thought to be true turns out to be false.

answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but

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